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  <font size="+3">&#8592;</font> <a href="https://hosseinmoein.github.io/DataFrame/docs/HTML/DataFrame.html">Back to Documentations</a><BR><BR>
  
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      <th>Signature</th> <th>Description</th> <th>Parameters</th>
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<pre class="code_syntax" style="color:#000000;background:#ffffff00;"><span class="line_wrapper"><span style="color:#004a43; ">#</span><span style="color:#004a43; ">include </span><span style="color:#800000; ">&lt;</span><span style="color:#40015a; ">DataFrame/DataFrameStatsVisitors.h</span><span style="color:#800000; ">&gt;</span></span>
<span class="line_wrapper"></span>
<span class="line_wrapper"><span style="color:#800000; font-weight:bold; ">template</span><span style="color:#800080; ">&lt;</span><span style="color:#800000; font-weight:bold; ">typename</span> T<span style="color:#808030; ">,</span> <span style="color:#800000; font-weight:bold; ">typename</span> I <span style="color:#808030; ">=</span> <span style="color:#800000; font-weight:bold; ">unsigned</span> <span style="color:#800000; font-weight:bold; ">long</span><span style="color:#808030; ">,</span></span>
<span class="line_wrapper">         <span style="color:#666616; ">std</span><span style="color:#800080; ">::</span><span style="color:#603000; ">size_t</span> A <span style="color:#808030; ">=</span> <span style="color:#008c00; ">0</span><span style="color:#800080; ">&gt;</span></span>
<span class="line_wrapper"><span style="color:#800000; font-weight:bold; ">struct</span> CumSumVisitor<span style="color:#800080; ">;</span></span>
<span class="line_wrapper"></span></pre>
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      <td>
        This is a single action visitor, meaning it is passed the whole data vector in one call and you must use the single_act_visit() interface.<BR><BR>
        This functor class calculates the cumulative sum of a given column. The constructor takes a single optional Boolean argument to whether skip NaN values. The default is True.<BR>
        The result is a vector of running sums<BR>
      </td>
      <td width="30%">
        <B>T</B>: Column data type.<BR>
        <B>I</B>: Index type.<BR>
        <B>A</B>: Memory alignment boundary for vectors. Default is system default alignment<BR>
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  </table>

  <pre style='color:#000000;background:#ffffff00;'>   <span style='color:#800000; font-weight:bold; '>static</span> <span style='color:#800000; font-weight:bold; '>void</span> test_some_visitors<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span>  <span style='color:#800080; '>{</span>

    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>cout</span> <span style='color:#808030; '>&lt;</span><span style='color:#808030; '>&lt;</span> <span style='color:#800000; '>"</span><span style='color:#0f69ff; '>\n</span><span style='color:#0000e6; '>Testing some visitors ...</span><span style='color:#800000; '>"</span> <span style='color:#808030; '>&lt;</span><span style='color:#808030; '>&lt;</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>endl</span><span style='color:#800080; '>;</span>

    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>unsigned</span> <span style='color:#800000; font-weight:bold; '>long</span><span style='color:#800080; '>></span>  idx <span style='color:#808030; '>=</span>
        <span style='color:#800080; '>{</span> <span style='color:#008c00; '>123450</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123451</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123452</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123453</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123454</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123455</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123456</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123457</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123458</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123459</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123460</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123461</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123462</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123466</span><span style='color:#808030; '>,</span>
          <span style='color:#008c00; '>123467</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123468</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123469</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123470</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123471</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123472</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>123473</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>         d1 <span style='color:#808030; '>=</span> <span style='color:#800080; '>{</span> <span style='color:#008000; '>1.0</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>10</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>8</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>18</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>19</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>16</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>21</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>17</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>11</span><span style='color:#808030; '>,</span> <span style='color:#008000; '>7.0</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>9</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>15</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>14</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>13</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>12</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>6</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>         d2 <span style='color:#808030; '>=</span> <span style='color:#800080; '>{</span> <span style='color:#008000; '>1.0</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>10</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>8</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>18</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>19</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>16</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>17</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>11</span><span style='color:#808030; '>,</span> <span style='color:#008000; '>7.0</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>9</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>15</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>14</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>13</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>12</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>6</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span>           i1 <span style='color:#808030; '>=</span> <span style='color:#800080; '>{</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>7</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>6</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span>            i2 <span style='color:#808030; '>=</span> <span style='color:#800080; '>{</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>10</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>8</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>18</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>19</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>16</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>17</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>3</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>11</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>7</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>9</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>15</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>14</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>13</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>12</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>6</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>4</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>         d3 <span style='color:#808030; '>=</span>
        <span style='color:#800080; '>{</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>10</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>numeric_limits<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span><span style='color:#800080; '>::</span>quiet_NaN<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>18</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>19</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>16</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>17</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>numeric_limits<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span><span style='color:#800080; '>::</span>quiet_NaN<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#808030; '>,</span>
          <span style='color:#008c00; '>2</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>11</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>7</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>numeric_limits<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span><span style='color:#800080; '>::</span>quiet_NaN<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>5</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>9</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>15</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>14</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>13</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>12</span><span style='color:#808030; '>,</span> <span style='color:#008c00; '>6</span> <span style='color:#800080; '>}</span><span style='color:#800080; '>;</span>
    MyDataFrame                 df<span style='color:#800080; '>;</span>

    df<span style='color:#808030; '>.</span>load_data<span style='color:#808030; '>(</span><span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>move</span><span style='color:#808030; '>(</span>idx<span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>make_pair<span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>dblcol_1</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> d1<span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>make_pair<span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>intcol_1</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> i1<span style='color:#808030; '>)</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    df<span style='color:#808030; '>.</span>load_column<span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>dblcol_2</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>move</span><span style='color:#808030; '>(</span>d2<span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> nan_policy<span style='color:#800080; '>::</span>dont_pad_with_nans<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    df<span style='color:#808030; '>.</span>load_column<span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>intcol_2</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>move</span><span style='color:#808030; '>(</span>i2<span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> nan_policy<span style='color:#800080; '>::</span>dont_pad_with_nans<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    df<span style='color:#808030; '>.</span>load_column<span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>dblcol_3</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>move</span><span style='color:#808030; '>(</span>d3<span style='color:#808030; '>)</span><span style='color:#808030; '>,</span> nan_policy<span style='color:#800080; '>::</span>dont_pad_with_nans<span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    SumVisitor<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span>     sum_visit<span style='color:#800080; '>;</span>
    ProdVisitor<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span>    prod_visit<span style='color:#800080; '>;</span>
    <span style='color:#800000; font-weight:bold; '>int</span>                 sum_result <span style='color:#808030; '>=</span> df<span style='color:#808030; '>.</span>visit<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span><span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>intcol_2</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> sum_visit<span style='color:#808030; '>)</span><span style='color:#808030; '>.</span>get_result<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    <span style='color:#800000; font-weight:bold; '>int</span>                 prod_result <span style='color:#808030; '>=</span> df<span style='color:#808030; '>.</span>visit<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>int</span><span style='color:#800080; '>></span><span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>intcol_1</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> prod_visit<span style='color:#808030; '>)</span><span style='color:#808030; '>.</span>get_result<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    assert<span style='color:#808030; '>(</span>sum_result <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>210</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>prod_result <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>464486400</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    CumSumVisitor<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>       cum_sum_visit<span style='color:#800080; '>;</span>
    <span style='color:#800000; font-weight:bold; '>const</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>   <span style='color:#808030; '>&amp;</span>cum_sum_result <span style='color:#808030; '>=</span> df<span style='color:#808030; '>.</span>single_act_visit<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span><span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>dblcol_3</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> cum_sum_visit<span style='color:#808030; '>)</span><span style='color:#808030; '>.</span>get_result<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    assert<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>.</span>size<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>0</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>1</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>11</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>19</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>195</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>18</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>189</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span><span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>isnan<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>2</span><span style='color:#808030; '>]</span><span style='color:#808030; '>)</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span><span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>isnan<span style='color:#808030; '>(</span>cum_sum_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>8</span><span style='color:#808030; '>]</span><span style='color:#808030; '>)</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    CumMaxVisitor<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>       cum_max_visit<span style='color:#800080; '>;</span>
    <span style='color:#800000; font-weight:bold; '>const</span> <span style='color:#666616; '>std</span><span style='color:#800080; '>::</span><span style='color:#603000; '>vector</span><span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span>   <span style='color:#808030; '>&amp;</span>cum_max_result <span style='color:#808030; '>=</span> df<span style='color:#808030; '>.</span>single_act_visit<span style='color:#800080; '>&lt;</span><span style='color:#800000; font-weight:bold; '>double</span><span style='color:#800080; '>></span><span style='color:#808030; '>(</span><span style='color:#800000; '>"</span><span style='color:#0000e6; '>dblcol_3</span><span style='color:#800000; '>"</span><span style='color:#808030; '>,</span> cum_max_visit<span style='color:#808030; '>)</span><span style='color:#808030; '>.</span>get_result<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>

    assert<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>.</span>size<span style='color:#808030; '>(</span><span style='color:#808030; '>)</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>0</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>1</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>1</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>10</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>19</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>18</span><span style='color:#808030; '>]</span> <span style='color:#808030; '>=</span><span style='color:#808030; '>=</span> <span style='color:#008c00; '>20</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span><span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>isnan<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>2</span><span style='color:#808030; '>]</span><span style='color:#808030; '>)</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
    assert<span style='color:#808030; '>(</span><span style='color:#666616; '>std</span><span style='color:#800080; '>::</span>isnan<span style='color:#808030; '>(</span>cum_max_result<span style='color:#808030; '>[</span><span style='color:#008c00; '>8</span><span style='color:#808030; '>]</span><span style='color:#808030; '>)</span><span style='color:#808030; '>)</span><span style='color:#800080; '>;</span>
<span style='color:#800080; '>}</span>
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